Mgs2 Not Substance

[Afterlife]

Hey im having problems when creating the image. at the end i get this error everytime.

Px Engine error (Command:28 Sense:03 ASC:11 ASCQ:05) reading from the disc.

I have no idea what this is? Does it mean the cd is too scratched and cant read it? Ive never had this problem before and my copy of the cd is fairly scratched(hence why im backing it up...).

Thanks